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In a class of a 100 students, the grades of a test are summarized in the...

In a class of a 100 students, the grades of a test are summarized in the following table:
Grade Frequency
91 – 100 11
81 – 90 31
71 – 80 42
61 – 70 16
Find the interval for the median grade

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Math   Statistics-And-Probability   
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